Project Cornerstone's mission is to educate the public about the importance of local construction aggregates (i.e., sand, gravel and crushed stone) through hands-on learning in Science, Technology, Engineering and Mathematics (STEM). Construction aggregates are used to build roads, houses, schools and all other infrastructure; they are the cornerstone of our communities.

Double tracking the LOSSAN corridor is a key activity to ensure the efficient movement of people and goods by rail. Building an additional track will allow additional rail cars to be used to transport people and cargo resulting in additional environmental benefits to our region.

The rail system plays a critical role in the movement of people and goods in the San Diego region, as well as between San Diego, Los Angeles, and points further north.

News

Welcome to Project Cornerstone News!

We are Project Cornerstone, a nonprofit dedicated to educating the public about the importance of local construction aggregates (i.e., sand, gravel and crushed stone) through hands-on learning in Science, Technology, Engineering and Mathematics (STEM).

If your child has or will participate in a Project Cornerstone activity and their school/program does not already have a media release form in place, please download, complete and return a Project Cornerstone Media Release Form.

Project Cornerstone, Inc.

Project Cornerstone's mission is to educate the public about the importance of local construction aggregates (i.e., sand, gravel and crushed stone) through hands-on learning in Science, Technology, Engineering and Mathematics (STEM). Construction aggregates are used to build roads, houses, schools and all other infrastructure; they are the cornerstone of our communities.